package com.ceshi.filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * Servlet Filter implementation class loginFilter
 */
public class loginFilter implements Filter {

	/**
	 * Default constructor.
	 */
	public loginFilter() {
		// TODO Auto-generated constructor stub
	}

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {

		HttpServletRequest req = (HttpServletRequest) request;
		HttpSession session = req.getSession();
		
		System.out.println(req.getServletPath());
		// 排除登录页面
		if (req.getServletPath().equals("/api/login")) {
			chain.doFilter(request, response);
			return ;
		}

		if (session.getAttribute("username") == null) {
			HttpServletResponse res = (HttpServletResponse) response;
			System.out.println("loginFilter:nologin");
			res.sendRedirect("/login");
		} else {
			String username = (String) session.getAttribute("username");
			String usertype = (String) session.getAttribute("usertype");
			System.out.println("loginFilter:" + username + "|" + usertype);
			chain.doFilter(request, response);
		}

	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		// TODO Auto-generated method stub
	}

}
